Stone-dressing machine



(No Model.)

H.'DONNELLY.

STONE DRESSING MAGHINE.

No. 332,999. 7 Patented Dec. 22, 1885.

WITNESSES UNITED STATES PATENT FFlGE HENRY DONNELLY, OF SUTHERLANDFALLS, VERMONT.

STONE-DREVSSING MACHINE.

SPECIFICATION forming part of Letters Patent No. 332,999, dated December22, 1885.

Application filed J nly 8, 1885. Serial no. 171,016. (No model.)

To all whom it may concern.-

Be it known that I, HENRY DONNELLY, a citizen of the United States ofAmerica, residing at Sutherland Falls, in the county of Rutlaud andState of Vermont, have invented certain new and useful Improvements inStone- Outting Machines; and I do hereby declare the following to be afull, clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame, reference being had to the accompanying drawings, and to lettersor figures of reference marked thereon, which form a part of thisspecification.

My invention relates to certain new and useful improvements in machinesfor cutting stone; and it consists in the construction and combinationof the parts whereby an even and steady power accompanied by a powerfulpressure can be applied to the cutting-knives, between which are placedthe slabs of stone which it is desired to cut, as will be hereinafterfully set forth, and specifically pointed out in the claims.

In the accompanying drawings, which illustrate my invention, Figure 1 isa side view of my improvement. Fig. 2 is a sectional view. Fig. 3 is asectional View taken through the line so 00 of Fig. 2, and Fig. 4 is adetailed view.

Arepresents a solid bed-plate to which is rigidly attached a pair ofvertical posts, 0 O, which are provided on their sides with verticalgrooves s 5. These upright posts 0 C are connected to each other by atransverse cappiece, B, which is securely bolted to the upper ends ofthe posts, as shown. This cappiece or crossbar B is provided at itscenter with bearings I) b, within which is journaled a shaft, H, whichcarries at its outer end the drive-wheel G. The shaft H, between thebearings b b, is provided with an eccentric or crank, F, to which ispivotally secured a bar,

F, the lower end of which is provided with a ball, K. A knife, E, isprovided at its upper portion with a socket for the reception of theball K, which is attached to the arm or bar F, so as to connect theknife with the eccentric portion of the shaft. The knife E isreciprocated vertically, and is guided in its upward movement by thegrooves s s. The knife E may be of any suitable configuration, and

at its lower portion it is provided with a straight cutting-edge, which,as well as the body portion of the knife, may be curved laterally, asshown in Fig.- 3, so that it may be employed to cut slabs havingirregular-shaped edges. A knife, D, of a similar configuration isrigidly attached to the upper surface of the bed-plate A between thegrooves s s.

I am aware that prior to my invention stonecutting machines have beenconstructed with upper and lower knives, between which are placed theslabs for severing the same, the upper knife being connected to apiston-rod of a steam-engine; but in practice it has been found thatsuch construction is objectionable,

as the blow which is imparted to the stone through the upper knife is ofsuch a nature that instead of forcing the stone apart on a line with theknife it shatters and irregularly breaks the edges, whereas with myimprovement a slow and powerful pressure is applied to the knife, whichwill split the stone on a line with the edges of the knife. The st k orstone slabs whichit is desired to sever e usually sawed to an eventhickness ani re held in position between the knives vhl e they arebeing brought together. Some m s the stock or slabs are uneven, one e geof the same being thicker or thinner i' i the other. When this is thecase, the -1011113 attached to the upperxknife will llow the knife toadjust its cutting-edge 119 1 the Surface of the stone so that it willact with the same throughout its entir g h, and thus allow the edges ofthe vi pe nd lower knife to be in contact wit h upper and lower surfacesof the slab fu commence, ment'to the end of the stro' The devicehereinbefoi "iiesfiflbed 18 seful for cutting up thin stoo Q pf marbleor scale for tile-floor, vsi l v s, furniture-tops, t l 8 d the kn vesare of the configuration whichiti (16311136 '60 give to the edges ofsaid slabs and by the device hereinb f d c ib d can sever the slabswithout waste d ie the corners with sharp anles. g If desirable otherconnections than the belth l can 1 made for the shaft H.

I claim-- In ;.machine for cutting stone, the comthe grooves s, and thecap-piece B, having the bearings 12, of the shaft H, having the eccen- 1trio or crank F and carrying the wheel G, the arm F, having the ball K,and the knife E. having the socket and placed parallel to the fixedknife D, as described.

In testimony whereof I affix my signature in 2: presence of twowitnesses.

HENRY DON N ELLY.

Vitnesses:

FRED R. PATCH, WM. SMITH, Jr.

